Maybe they'll stop ending work from home. Other aspects, there are no supply chains from China that directly affect AT&T, although, a slowdown of Apple handsets could slow cellular. Since cell phone is someone's only phone in most cases, that should be consider a consumer basic. Other areas, like premium television is a consumer discretionary, but absent to this virus leading to layoffs in the broad economy, I'm not seeing much there either.
The market is pricing in a Fed rate cut, so, that makes AT&T's dividend that much more attractive. Compared to stocks that pay no dividends, AT&T's dividend should be a bit of a shock absorber to a price collapse in its stock.